1.	Simplify 1 Simplify the following expression: $$ {\left(-2 - 3\right)}^{2} - \left(-1 - -1\right)\left(-5 + -5\right) $$ Correct Answer $$ 25$$ or 25.0000

2.	Simplify 2 Simplify the following expression: $$ {\left(2 + 3\right)}^{2} - \left(\frac{4}{5} + 4 - -3\right) $$ Correct Answer $$ \frac{86}{5}$$ or 17.2000

3.	Fractions 1 Simplify the following expression: $$ \frac{5}{2} + \frac{-1}{5} $$ Correct Answer $$ \frac{23}{10}$$ or 2.3

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{-5}{5}}{\frac{-1}{3}} $$ Correct Answer $$ 3$$ or 3.0

5.	Significant figures 1. Write the following to 5 significant figures: 0.0012386912 Correct Answer 0.0012387 or $$1.2387\times10^{-3}$$ 2. Write the following to 3 significant figures: 0.35325443 Correct Answer 0.353 or $$3.53\times10^{-1}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 1600.46 Correct Answer $$1.60\times10^{3}$$ 2. Write the following in standard form to 5 significant digits: 0.00000470810 Correct Answer $$4.7081\times10^{-6}$$

7.	Significant figures 1. Write the following in preferred standard form to 5 significant digits: 0.02024365 Correct Answer $$20.244\times10^{-3}$$ 2. Write the following in preferred standard form to 2 significant digits: 24440 Correct Answer $$24\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{-3\times6 - \left(6 + 6\right)}{{\left(\frac{4}{-2}\right)}^{2}} $$ Correct Answer $$ \frac{-15}{2}$$ or -7.50000

9.	Simplify 1 Simplify the following expression: $$ {\left(-2 + 4\right)}^{2} + 2(-6)\left(-2 + -4\right) $$ Correct Answer $$ 76$$ or 76.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{-4}{2}{5}^{-1} - 2(-3)4 $$ Correct Answer $$ \frac{118}{5}$$ or 23.6000